The book is a comprehensive user's guide for IEEE 802.11ac (Wireless Computer Network Systems) written by a Vice-Chair of 802.11ac Workshop and an associate. The book digests IEEE 802.11ac standard in a systematic and easy-to-read format to facilitate practical implementation of the standard, offering a brief history of the standard, an explanation of physical layer specifications, and the standard's main feature, Medium Access Control. This provides the definitive guide to implementing IEEE 802.11ac.